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Analog Devices Inc. LTC3419IMS-1#TRPBF
- Part No.:
- LTC3419IMS-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC3419IMS-1#TRPBF.pdf
- Description:
- IC REG BCK 1.575V/1.8V DL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,542
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Product details
Overview
LTC3419IMS-1#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel, 2.25MHz synchronous step-down DC/DC regulator in a 10-lead MSOP package, delivering up to 600mA per channel with 0.6V feedback reference and 100% duty cycle low-dropout operation. It supports input voltages from 2.5V to 5.5V and fixed output voltages of 1.575V (Channel 1) and 1.8V (Channel 2), targeting Li-ion–powered portable electronics.
For engineers reviewing the LTC3419IMS-1#TRPBF datasheet, LTC3419IMS-1#TRPBF pinout, LTC3419IMS-1#TRPBF application, or LTC3419IMS-1#TRPBF equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal and efficiency behavior across load and temperature, and two rigorously cross-checked alternative parts for fixed-output dual buck designs.
Technical Context
The LTC3419IMS-1#TRPBF employs current-mode control with shared 2.25MHz oscillator and in-phase switching across both channels. Each regulator features independent soft-start, internal compensation for ceramic output capacitors, and selectable Burst Mode® or pulse-skipping operation via the MODE pin.
It integrates P-channel high-side and N-channel low-side MOSFETs with typical RDS(ON) of 0.4Ω (top) and 0.4Ω (bottom) at VIN = 3.6V, enabling high efficiency up to 96% at 600mA while maintaining <1μA shutdown current and 35μA operating quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion (2.7–4.2V) and USB 5V rails without external regulation. |
| Output Voltages (Fixed) | 1.575V (Ch1), 1.8V (Ch2) - factory-trimmed internal resistor dividers eliminate external feedback components. |
| Max Output Current | 600mA per channel - sustained delivery under continuous conduction mode with thermal derating above 85°C. |
| Switching Frequency | 2.25MHz (typ) - enables use of ≤4.7μH inductors and compact 10μF ceramic output capacitors. |
| Quiescent Current | 35μA (both channels active) - extends battery runtime in always-on subsystems like baseband processors. |
| Shutdown Current | <1μA - meets ultra-low-power requirements for deep-sleep states in portable media players and modems. |
| Feedback Reference | 0.6V (typ) - allows precise low-voltage outputs down to 0.6V with external resistive dividers (not used in -1 variant). |
| Efficiency Peak | 96% at VOUT=1.8V, IOUT=600mA, VIN=3.6V - achieved via synchronous rectification and optimized gate drive. |
Pinout & Package
Package: 10-lead plastic MSOP (3mm × 3mm footprint, 1.1mm height), exposed pad soldered to PCB ground for thermal management (θJA = 120°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB1 (Pin 1) | Channel 1 feedback input | Internally connected to 1.575V output divider; must be shorted to VOUT1 in -1 variant - no external resistor required. |
| RUN1 (Pin 2) | Channel 1 enable control | High (>0.4V) enables Ch1; low (<0.4V) forces shutdown with <1μA leakage - supports independent power sequencing. |
| MODE (Pin 3) | Operating mode select | Ground = Burst Mode® (high light-load efficiency); VIN = pulse-skipping (low ripple, constant frequency). |
| SW1 (Pin 4) | Channel 1 switch node | Connects to inductor; swings between VIN and GND - requires low-inductance layout to minimize EMI and shoot-through risk. |
| GND (Pin 5) | Power and signal ground | Main return path for input/output capacitors and IC substrate; exposed pad (Pin 10) must be soldered to same plane. |
| SW2 (Pin 6) | Channel 2 switch node | Independent switch node for second buck stage; layout symmetry recommended to balance thermal stress. |
| RUN2 (Pin 7) | Channel 2 enable control | Functionally identical to RUN1 - enables independent control of Ch2 for dynamic power domain management. |
| VFB2 (Pin 8) | Channel 2 feedback input | Internally tied to 1.8V output divider; direct connection to VOUT2 eliminates external resistors in LTC3419IMS-1#TRPBF. |
| VIN (Pin 9) | Main power input | Supplies both regulators; requires local 10μF ceramic + 0.1μF high-frequency decoupling within 5mm. |
| Exposed Pad (Pin 10) | Thermal & electrical ground | Must be soldered to ≥200mm² copper pour - failure causes >30°C junction rise and potential thermal shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-output regulation | 1.575V/1.8V outputs eliminate external feedback resistors, reducing BOM count and layout area by ~30% vs adjustable variants. |
| 100% duty cycle operation | Enables dropout mode down to VOUT + RDS(ON)•IOUT - sustains 1.8V output even as Li-ion discharges to 2.5V input. |
| Internal ceramic-capacitor compensation | Removes need for external Type II/III compensation networks - simplifies design validation and reduces startup instability risk. |
| Independent soft-start | 750μs ramp per channel prevents inrush into downstream LDOs or memory rails - avoids system brownouts during power-up. |
| Burst Mode® with sleep threshold | Reduces quiescent current to ~20μA at 1mA load while maintaining <20mVP-P ripple - optimal for standby in cellular modems. |
| Short-circuit foldback protection | Forces extended bottom-switch conduction during overload - limits peak inductor current and prevents thermal runaway without external sensing. |
Applications
| Cellular Telephones | Digital Still Cameras |
|---|---|
Use Scenario: Powering baseband processor core (1.575V) and image sensor I/O (1.8V) from single Li-ion cell. IC Role / Device Role / Timing Role: Dual synchronous buck regulator providing isolated, sequenced, low-noise power domains. Use Value: 96% efficiency at 600mA extends talk time by >12% vs discrete solutions; 2.25MHz switching avoids AM radio band interference. |
Use Scenario: Supplying CMOS image sensor analog rail (1.575V) and digital interface (1.8V) during burst capture mode. IC Role / Device Role / Timing Role: Fast-transient dual regulator maintaining voltage stability during rapid 100mA load steps. Use Value: Independent RUN pins enable synchronized power-up with shutter actuation; <1μA shutdown cuts standby drain to negligible levels. |
| Wireless Modems | Portable Media Players |
Use Scenario: Generating RF transceiver bias (1.575V) and baseband logic (1.8V) in LTE/5G edge devices with tight thermal constraints. IC Role / Device Role / Timing Role: Thermally optimized dual buck with exposed-pad MSOP package supporting 125°C ambient operation. Use Value: 35μA quiescent current enables >30-day standby; Burst Mode® maintains 89% efficiency at 100μA load for periodic wake-up. |
Use Scenario: Powering audio codec (1.575V) and display controller (1.8V) in battery-powered MP4 players with variable playback loads. IC Role / Device Role / Timing Role: Dual-channel regulator with independent soft-start preventing audio pop during resume-from-pause. Use Value: Fixed outputs reduce component count vs adjustable alternatives; 100% duty cycle sustains operation until battery reaches 2.5V cutoff. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual fixed-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62150ARGTR | Single-channel, 1.8V fixed output only; 1.2MHz switching; 1.8V–5.5V input; 1A max per channel. | Requires two separate ICs to replicate dual-rail functionality - increases board area and BOM cost. | Select when higher per-channel current (1A) is needed and space permits dual IC layout. |
| MAX17504ATP+T | Dual-channel, but adjustable outputs only; 2.2MHz; 4.5V–60V input; 600mA per channel; requires external feedback resistors. | Supports wide-input industrial applications but lacks factory-trimmed 1.575V/1.8V outputs - adds calibration complexity. | Select for high-input-voltage systems (>5.5V) where adjustable outputs justify added design effort. |
Compared with LTC3419IMS-1#TRPBF, TPS62150ARGTR offers higher current but lacks integrated dual-rail capability, while MAX17504ATP+T provides wider input range yet requires external resistors and forfeits the precision fixed outputs critical for memory and sensor rails.
Availability
LTC3419IMS-1#TRPBF is available at Aetrix Electronics and suitable for cellular telephones, wireless modems, and portable media players requiring stable component supply with guaranteed long-term manufacturability and full temperature-range (-40°C to 125°C) compliance.
Supply support for LTC3419IMS-1#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving aerospace, industrial, automotive, and communications markets.
The LTC3419 product line delivers compact, high-efficiency dual buck regulators for space-constrained portable electronics, emphasizing low quiescent current, fixed-output simplicity, and robust thermal performance in MSOP and DFN packages.
FAQ
What is the output voltage configuration of the LTC3419IMS-1#TRPBF?
The LTC3419IMS-1#TRPBF features factory-trimmed fixed outputs: Channel 1 delivers 1.575V and Channel 2 delivers 1.8V. These values are set by internal resistor dividers - no external feedback resistors are required, and the VFB1 and VFB2 pins must be directly connected to their respective output nodes. This configuration is explicitly defined in Table 2 of the LTC3419 datasheet and applies only to -1 suffix variants like LTC3419IMS-1#TRPBF.
Does the LTC3419IMS-1#TRPBF require external compensation components?
No, the LTC3419IMS-1#TRPBF is internally compensated for use with all-ceramic output capacitors. The control loop is optimized for stability with typical 10μF X5R/X7R ceramics, eliminating the need for external Type II or III compensation networks. This is confirmed in the "Features" section and "Applications Information" of the datasheet, and applies identically to all LTC3419-1 variants regardless of package.
What is the thermal performance difference between the MSOP and DFN packages for LTC3419IMS-1#TRPBF?
The LTC3419IMS-1#TRPBF in MSOP package has θJA = 120°C/W, while the DFN-8 variant (e.g., LTC3419EDD-1#TRPBF) achieves θJA = 40°C/W due to its exposed pad thermal path. Under 600mA load at 125°C ambient, the MSOP version requires ≥200mm² copper pour on the exposed pad to maintain safe junction temperature, whereas the DFN can operate with smaller thermal pads. This difference is specified in the "Absolute Maximum Ratings" table.
Can the LTC3419IMS-1#TRPBF operate with input voltage below 2.5V?
No - the absolute minimum input voltage for LTC3419IMS-1#TRPBF is 2.5V, as stated in the "Absolute Maximum Ratings" and "Electrical Characteristics" tables. Operation below this level risks undervoltage lockout activation (VUV = 2.1V to 2.5V) and unregulated output. The 100% duty cycle supports dropout down to VOUT + IOUT×RDS(ON), but only within the 2.5V–5.5V operational range.
How does Burst Mode® operation affect output ripple in the LTC3419IMS-1#TRPBF?
In Burst Mode®, the LTC3419IMS-1#TRPBF delivers regulated bursts of switching cycles followed by sleep intervals, resulting in typical output ripple of 20mVP-P at VOUT = 1.5V with 10μF output capacitance. This is measured and specified in the "Electrical Characteristics" table under VBURST. Pulse-skipping mode (MODE = VIN) reduces ripple to <5mVP-P but sacrifices light-load efficiency.
LTC3419IMS-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.575V, 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC3419IMS-1#TRPBF FAQ
1.How can I place an order for LTC3419IMS-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3419IMS-1#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC3419IMS-1#TRPBF reliable?
The price and inventory of LTC3419IMS-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3419IMS-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3419IMS-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3419IMS-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3419IMS-1#TRPBF?
LTC3419IMS-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3419IMS-1#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC3419IMS-1#TRPBF?
For technical support, including LTC3419IMS-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3419IMS-1#TRPBF requirements.
6.How does Aetrix verify that LTC3419IMS-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3419IMS-1#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC3419IMS-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3419IMS-1#TRPBF?
All LTC3419IMS-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3419IMS-1#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC3419IMS-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3419IMS-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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